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Tag: studies

  • Pregnancy, breastfeeding may offer some protection against cognitive decline

    Many moms feel scatterbrained, so it might seem counterintuitive that new research has found a link between pregnancy and breastfeeding and higher cognitive function later in life.

    The findings, published by the Alzheimer’s Association, take on a special significance considering that women are disproportionately affected by dementia. Nearly two-thirds of Americans with Alzheimer’s are women, the reasons for which are not fully understood.


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    To explore the link between female reproduction and dementia, researchers analyzed data from more than 7,000 women who each were around age 70. The women gave information about their reproductive histories and underwent annual cognitive assessments for 13 years.

    More cumulative time spent breastfeeding and pregnant was associated with greater cognition, verbal memory and visual memory, the researchers found.

    More specifically, women who had been pregnant scored higher on cognitive ability tests than those who had never been pregnant. Women who had breastfed had higher cognitive ability scores and verbal memory scores than those who had never breastfed. These benefits were similar in scale to the impact that being physically active and avoiding smoking have on improved cognition, the researchers said.

    The researchers said they now are delving further into the way certain reproductive histories may offer protection against cognitive decline.

    “If we can figure out, as a next step, why those reproductive patterns lead to better cognitive outcomes in old age, then we can work toward figuring out how to craft therapies — for example, new drugs, repurposed drugs or social programs — that mimic the naturally-occurring effect we observed,” said the study’s lead author, Molly Fox, an anthropology professor at the University of California Los Angeles.

    Courtenay Harris Bond

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  • Playing ‘pink noise’ sounds, like rainfall, to fall asleep may harm REM sleep

    It’s common for people to play continuous wave sounds and other gentle nature noises on their phones to lull themselves to sleep. But this type of “pink noise” may actually be backfiring, a new Penn Medicine study suggests.

    The Sleep Foundation‘s definition of pink noise is a bit technical: “noise frequencies that decrease in power with each higher octave to create a lower pitch.” But it’s often compared to nature sounds like steady rainfall, wind or waves.


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    Health experts sometimes prescribe pink noise for people who have trouble sleeping or to promote relaxation, because it has been found to be more gentle than white noise, which has a higher pitch and sounds similar to static from an untuned radio or TV.

    But researchers from the University of Pennsylvania found pink noise interferes with restorative rapid eye movement (REM) sleep and sleep recovery. Wearing earplugs is a more effective way to block out traffic noise, the study found. 

    “REM sleep is important for memory consolidation, emotional regulation and brain development, so our findings suggest that playing pink noise and other types of broadband noise during sleep could be harmful — especially for children whose brains are still developing and who spend much more time in REM sleep than adults,” said Dr. Mathias Basner, the study’s lead author.

    For the study, published Monday in the journal Sleep, researchers had 25 adults spend their nights for an entire week in a sleep lab. The participants were not in the habit of using noise to help them sleep and had no sleep disorders.

    The researchers exposed the participants to aircraft noise, pink noise, aircraft noise with pink noise and aircraft noise with earplugs. Researchers then used different methods each morning to test the participants’ sleep quality, alertness and other health effects.

    They found exposure to aircraft noise overnight led to a 23-minute drop in the deepest stage of REM sleep, but wearing earplugs essentially blocked out the air traffic sounds.

    Pink noise by itself, equivalent to “moderate rainfall,” was linked to a loss of 19 minutes of REM sleep. And pink noise combined with aircraft noise led to “significantly shorter” time spent in deep sleep and REM sleep compared to nights without any type of noise.

    Participants also reported that their sleep felt lighter, that they woke up more frequently throughout the night and that their overall quality of sleep was worse when they were exposed to aircraft or pink noise. But using earplugs against pink noise and aircraft noise improved their overall quality of sleep.

    The effects of pink noise, white noise and other types of broadband noise — used by 16% of Americans at night — need further study, the researchers concluded.

    “Overall, our results caution against the use of broadband noise, especially for newborns and toddlers, and indicate that we need more research in vulnerable populations, on long-term use, on the different colors of broadband noise, and on safe broadband noise levels in relation to sleep,” Basner said. 

    Courtenay Harris Bond

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  • Physical activity can extend your life, but varying your exercises is particularly beneficial

    People who like to change up their exercise routines are in good shape.

    It’s the variety of workouts, not just the amount and duration of exercise, that really counts when it comes to extending one’s lifespan, a study published Tuesday suggests.


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    “If the total amount of physical activity is kept constant, you will get additional benefits from doing a mix of physical activities,” Han Han, a Harvard postdoctoral research fellow, told NewScientist.

    For the study, Harvard researchers analyzed data collected from 111,000 adults over a 30-year period. People reported how much time they spent each week engaging in various physical activities including walking, running, swimming, bicycling, weight lifting, resistance training, yoga and stretching. Researchers also accounted for the amount of stairs people climbed and the amount of moderate or heavy outdoor work they did. 

    As expected, people who exercised more often had a lower risk of premature death. It ranged between 4% and 17%, depending on the average amount of exercise over the course of the study. But surprisingly, people who participated in the widest range of exercise types had a nearly 20% lower risk of premature death than people who were equally active but did a narrower variety of workouts.

    Swimming was an exception. It did not correlate with an extended lifespan – but that does not mean it isn’t a worthwhile activity, just that more research is needed into its relationship with all-cause mortality, the study said.

    The bottom line? Mix it up.

    “When deciding how to exercise, keep in mind that there may be extra health benefits to engaging in multiple types of physical activity, rather than relying on a single type alone,” Yang Hu, a study’s authors a research scientist at Harvard, said in a statement.

    Despite its large cohort and extended duration, the study had limitations. The data was based on people reporting their exercise choices and levels, which can lead to errors. Also, the participants mostly were white health care professionals – a lack of diversity that could skew the results, researchers said.

    Courtenay Harris Bond

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  • Dry January isn’t just a month away from alcohol. It leads to long-term reductions in drinking

    Abstaining from alcohol for short periods of time — like Dry January — leads to reduced drinking in the long run and various physical and psychological improvements, new research shows.

    Researchers at Brown University analyzed 16 studies that evaluated Dry January, the month-long sobriety challenge, and found that participants reported improved sleep, better moods, weight loss, improved concentration and more energy. They continued to drink less alcohol afterward and showed an improved ability to refuse drinks.


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    Avoiding alcohol for a month also reduces liver fat, improves insulin levels and lowers cancer-related growth factors, Suzanne Colby, one of the study’s authors and a professor of Behavioral and Social Sciences, told the Boston Globe.

    Even cutting back on alcohol led to similar benefits, Colby said.

    “They still had some reduction in drinking that was sustained and part of that was they still gained confidence for reducing or refusing drinks in social situations, which I think is a big part of the effect: Learning how to navigate socializing without drinking, which can be really challenging to do because they are really intertwined.” 

    Dry January began in the United Kingdom in 2013. Each year, millions of people participate by vowing to not drink alcohol, or reduce their consumption habits, during January. Participants tend to be younger, female, have higher incomes and a college degree, the Brown University researchers found. Participants also tend to be heavy drinkers. 

    The analysis, published in the journal Alcohol and Alcoholism in September, analyzed data from more than 150,000 Dry January participants, mostly from the U.K.

    The Dry January participants that found the greatest success in abstaining from alcohol formally registered on the Dry January campaign website, used guides like the Try Dry app or received daily coaching emails, the study found. The campaign’s success at targeting heavy drinkers — a group difficult to reach through intervention programs — led the researchers to recommend expanding outreach on the benefits of the Dry January and investing in tools that keep participants on track.

    “The effort leads to sustained moderation: most participants continue to drink less alcohol rather than increasing consumption afterwards,” Megan Strowger, who led the study as a postdoctoral fellow and now works at the University of Buffalo, said in a press release“Overall, participating in Dry January allows people to pause, reflect and rethink their relationship with alcohol, including how it affects their social life, mental health and physical health.”

    Americans have shown a growing wariness to drink alcohol as its health implications have become more publicized. A Gallup poll released in August found that 54% of adults say they drink alcohol. That’s the lowest reported percentage since 1939. 

    In January, the U.S. surgeon general published an advisory report that linked alcohol use to seven types of cancer. A study published in March suggested alcohol consumption at any level increases the risk of dementia. 

    For people interested in eliminating alcohol consumption, experts recommend tracking one’s progress, participating in a social environment that supports the goal of staying sober or trying “Damp January,” which consists of cutting back on drinking rather than giving it up entirely. 

    “There is so much more support for living an alcohol-free lifestyle now,” Colby said in the press release. “It is more socially acceptable than ever to be ‘sober curious’ or alcohol free. Social norms have shifted, in part with the help of influencers on social media sharing the benefits of sobriety and reducing the stigma of not drinking.” 

    Molly McVety

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  • Support groups for alcohol use disorder are more effective when they are attended in person

    Much of life went virtual during the COVID-19 pandemic — work, school and even some doctor’s appointments. So did many support groups for people with alcohol use disorder.

    But people who attended Alcoholic Anonymous, SMART Recovery, Women for Sobriety and other mutual-help groups in person were “significantly” more likely to maintain sobriety than people who participated in these groups only online, a recent study shows.


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    “Online meetings are convenient and widely available, so they could theoretically support many people who face barriers to in-person attendance, such as young people and rural populations,” Sarah Zemore, the study’s principal investigator, said in a statement. “Unfortunately, attending online meetings exclusively was associated with poorer outcomes.”

    The study, led by researchers at Stanford University and the Alcohol Research Group, used data from more than 1,000 adults who took part in a previous study conducted between 2015 and 2021. It found that people who only attended mutual-help groups online were about half as likely to report that they had maintained their sobriety. At a three-month follow-up, people who attended only online were three times more likely to report problems with alcohol.

    People who attended groups in person and online were as likely to maintain abstinence as people who only went to meetings in person.

    One of the reasons why people attending only online may have had worse outcomes may have been because they reported lower participation levels in the meetings, researchers said.

    Nearly 28 million people in the United States have alcohol use disorder. They have trouble stopping or controlling their consumption of alcohol despite adverse effects on relationships, careers and overall health.

    Two years ago, the World Health Organization declared that no level of drinking is safe – not even moderate drinking. In January, former U.S. Surgeon General Vivek Murthy issued an advisory about alcohol consumption increasing the risk for seven types of cancer. He called for warning labels on alcohol about its carcinogenic risk.

    Several medications are available to treat alcohol use disorder, including naltrexone, which helps decrease cravings and reduce the amount of alcohol consumed during drinking episodes. Therapy and group supports are also important parts of a full recovery program for alcohol use disorder.

    Courtenay Harris Bond

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  • Generation X was the first to grow up with ultra-processed foods. Many struggle to stop eating them

    People now in their 50s and 60s were the first generation to grow up when ultra-processed foods – often high in fats, salt and added sugar – became widely available.

    New research shows that this segment of the population, which mostly includes Generation X, exhibit signs of addiction to ultra-processed food products including fast food, soda and sweets. The study, published Monday in the journal Addiction, has implications for public health, because many children are now exposed to ultra-processed food from a very young age.


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    “If current trends continue, future generations may show even higher rates of ultra-processed food addiction later in life,” said the study’s senior author, Ashley Gearhardt, who leads the Food and Addiction Science & Treatment Lab at the University of Michigan. “Just as with other substances, intervening early may be essential to reducing long-term addiction risk across the lifespan.”

    For the study, researchers conducted phone and online surveys of a nationally-representative group of more than 2,000 people in the United States, ages 50 to 80.

    The findings showed that 21% of women and 10% of men ages 50 to 64 had strong cravings for ultra-processed foods, repeated unsuccessful attempts to cut down on consumption and withdrawal symptoms. They also avoided social activities because of fear of overeating – all symptoms meeting clinical criteria for addiction.

    The percentage of older adults, ages 65 to 80, that met the criteria for addiction to ultra-processed foods was much lower: 12% of women and 4% of men.

    A possible explanation for why Gen X women reported higher rates of addiction to ultra-processed food than Gen X men might be due to marketing of processed “diet” foods – such as low-fat cookies and microwavable meals – to women of that generation, the researchers said.

    The study also found an association between social isolation and ultra-processed food addiction. People who reported their mental health status as “fair” or “poor” were also at higher risk for addiction to ultra-processed foods.

    Courtenay Harris Bond

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  • Young children with ADHD are being medicated too quickly, study says

    Pediatricians are too quick to prescribe medication for young children with attention-deficit/hyperactivity disorder, a new analysis shows.

    The American Academy of Pediatrics recommends behavioral therapy for at least six months after an ADHD diagnosis in preschool age children, but doctors often prescribe stimulants as a first-line strategy, according to the study, published Friday in JAMA Network.


    “That’s concerning, because we know starting ADHD treatment with a behavioral approach is beneficial; it has a big positive effect on the child as well as on the family,” said Dr. Yair Bannett, the study’s lead author and an assistant professor of pediatrics at Stanford Medicine.

    ADHD stimulant medications are less effective for preschool-aged children. Children under 6 cannot fully metabolize the medications and have an increased chance for side effects, which may include decreased appetite, difficulty sleeping, emotional outbursts, irritability and repetitive behaviors or thoughts, according to the AAP.

    “We don’t have concerns about the toxicity of the medications for 4- and 5-year-olds, but we do know that there is a high likelihood of treatment failure, because many families decide the side effects outweigh the benefits,” Bannett said.

    The study analyzed data from more than 700,000 children across eight health systems in the United States. More than 9,700 of those children were diagnosed with ADHD when they were 4 or 5.

    About two-thirds of those children were prescribed ADHD medication before age 7, with more than 42% of them receiving medication within 30 days of diagnosis, according to the study.

    The researchers reported especially high rates of early medication in white children, likely due to the fact that Black, Hispanic and Asian children were less likely to receive an ADHD diagnosis, according to the study.

    Children with publicly funded health insurance through Medicaid and the Children’s Health Insurance Program were more likely to receive medication earlier than children with private insurance. Systemic barriers to evidence-based behavioral therapies and specialists may explain this finding, the researchers said.

    “Behavioral treatment works on the child’s surroundings: the parents’ actions and the routine the child has,” Bannett said.

    For young children, the APA recommends giving behavioral interventions six months to see if they are effective before jumping to medication. The APA recommends behavioral interventions in combination with medication in older children.

    Approximately 7 million children in the U.S. have ADHD. That is about 1 in every 10 children, ages 3 to 17, according to the Centers for Disease Control and Prevention.

    ADHD symptoms include difficulty maintaining focus, hyperactivity and impulsivity, according to the American Psychiatric Association.

    Courtenay Harris Bond

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  • Not drinking enough water floods your body with harmful stress hormones

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    A new study found that hydration is key when it comes to managing stress. 

    People who drink less than seven cups, or 1.5 liters, of water per day have a cortisol response to stress that is 50% higher than those who meet water intake recommendations. 

    Researchers at Liverpool John Moores University (LJMU) published the study in the Journal of Applied Physiology.

    WEARABLE HYDRATION MONITOR COULD HELP PREVENT HEATSTROKE, SCIENTISTS SAY

    Out of 62 healthy males and females, 32 participants were selected with both habitual low fluid intake and habitual high fluid intake.

    Subjects who typically drank less than 1.5 liters of fluid per day were considered the “low-fluid” group, while the “high-fluid” group comprised people who drank the recommended amount of two liters for women and 2.5 for men. 

    New study reveals people drinking less than 1.5 liters of water daily show 50% higher cortisol stress responses than those meeting hydration recommendations. (iStock)

    The participants’ fluid intake was monitored over seven days by testing the Trier Social Stress Test (TSST) and hydration markers with blood and urine.  

    The study found that drinking too little water increased stress-related health issues for both men and women. 

    Professor Neil Walsh, study lead at LJMU’s School of Sport and Exercise Sciences, said in a press release that keeping a water bottle nearby during stress-related times can have potential benefits for your long-term health.

    ‘HYDRATION BOOSTERS’ OR JUST WATER? MEDICAL EXPERTS MAKE RECOMMENDATIONS FOR BEATING THE SUMMER HEAT

    “Cortisol is the body’s primary stress hormone and exaggerated cortisol reactivity to stress is associated with an increased risk of heart disease, diabetes and depression,” said Walsh.

    A study team member, Dr. Daniel Kashi, said in a release that “both groups felt equally anxious and experienced similar increases in heart rate during the stress test.”

    woman drinking water

    An important observation was that poor hydration was associated with greater cortisol reactivity to the stress test. (iStock)

    He added that “only the ‘low-fluid’ group showed a significant increase in saliva cortisol in response to the stress test.” 

     “Although the low-fluid group did not report being thirstier than the high fluid group, they had darker and more concentrated urine, clear signs of poor hydration,” said Kashi.

    “An important observation was that poor hydration was associated with greater cortisol reactivity to the stress test. Exaggerated cortisol reactivity to stress has been associated with poor long-term health,” Kashi added. 

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    Long-term dehydration can lead to more serious health issues such as kidney damage and failure, anxiety and depression, heart problems, and diabetes, according to the Cleveland Clinic.

    Dehydration triggers the release of the vasopressin hormone, which puts pressure on the kidneys, making it harder to concentrate urine and manage electrolyte balance.  

    Researchers suggest that monitoring urine color is a good way for people to check their hydration status.

    Researchers suggest that monitoring urine color is a good way for people to check their hydration status. (iStock)

    “Vasopressin also acts on the brain’s stress-response cent[er]” influencing where it can release of cortisol,” according to the LJMU release. 

    The release added, “This dual role [of] vasopressin helps maintain blood volume and electrolyte balance but also increases cortisol.”

    While researchers found that water intake recommendations should be followed, additional research and further long-term studies are needed.

    For more health articles, visit www.foxnews.com/health

    Researchers suggest that monitoring urine color is a good way for people to check their hydration status.

    Light yellow urine color typically indicates good hydration. 

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    “Being hydrated may help your body manage stress more effectively,” he said.

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  • Red meat can help your mood if part of a healthy, balanced diet, study suggests

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    Lean red meat could support mental health as long as it’s part of an overall healthy diet, according to an exploratory new study.

    Researchers at South Dakota State University (SDSU) analyzed data from the American Gut Project, a large, open-source microbiome initiative with over 11,000 participants. 

    The study, published as an abstract in May in the journal Current Developments in Nutrition, examined 4,915 adults and grouped them by red-meat intake and diet quality based on the U.S. Department of Agriculture’s Healthy Eating Index (HEI), which scores diets on a scale of 0 to 100.

    STUDY CLAIMS VEGETARIANS MORE ‘AMBITIOUS’ AS MEAT EATERS CALL OUT ‘OVERSIMPLIFICATION’

    Participants with higher HEI scores — regardless of red-meat intake — were less likely to report depression, post-traumatic stress disorder (PTSD) and bipolar disorder. 

    But those who ate red meat as part of a high-quality diet showed additional benefits. 

    New research suggests that eating red meat as part of a high-quality diet may improve mental health. (iStock)

    Those benefits include higher protein intake; better adequacy of key brain-supporting nutrients such as zinc, selenium, vitamin B-12 and choline, which help regulate memory, mood, muscle control and other functions; and a more diverse gut microbiota.

    Previous studies have found that gut bacteria produce neurotransmitters such as serotonin and dopamine, which are central to mood regulation, cognition and stress response and resilience. 

    Lean red meat had a slightly less disruptive effect on the gut than chicken, Fox News Digital previously reported.

    “What was really compelling was the significant nutritional benefit we saw in healthy eaters who consumed red meat,” Samitinjaya Dhakal, assistant professor at SDSU’s School of Health and Human Sciences, said in a news release. 

    EATING CHICKEN LINKED TO HIGHER MORTALITY RATES, OBSERVATIONAL STUDY SUGGESTS

    The preliminary findings, he added, support a “less rigid” approach to healthy eating that focuses on dietary patterns rather than cutting out certain foods altogether, like red meat, which previous research has linked to cardiovascular disease and cancer.

    “This suggests the public health message shouldn’t be about complete elimination — but about building a high-quality diet into which lean red meat can fit,” Dhakal said. 

    Friends smiling being served meat at restaurant by waitress

    Healthy, balanced diets showed lower odds of depression, PTSD and bipolar disorder in those who consumed them. (iStock)

    Yet experts warn that other research has tied red and processed meat to poor physical and cognitive health outcomes. 

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    A 2020 United Kingdom study of adults aged 37 to 73 linked higher red-meat consumption to weaker problem-solving, short-term memory and planning skills.

    And a 10-year study of over 133,000 U.S. nurses found that eating red meat — particularly processed types like bacon and sausage — was tied to faster memory decline and a higher risk of dementia.

    “This study makes the important distinction of assessing red meat in the context of a healthy diet.”

    “It’s worth remembering that we still have decades of evidence linking processed and high-fat meats to things like heart disease and diabetes,” noted Jenny Shields, Ph.D., a clinical health psychologist based in The Woodlands, Texas. 

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    “This study doesn’t erase that,” Shields told Fox News Digital. “What it does say is that, in the context of an already healthy diet, a moderate amount of lean red meat doesn’t seem to cause harm, and it may help fill gaps in nutrients like B-12 or zinc.”

    A balanced diet can play a powerful part in the foundation for better focus, energy and mood, she said.

    Long-term studies that directly compare diets with and without red meat would be needed to prove correlation instead of just causation, she added.

    Grilled beef steaks seen garnished with veggies and potatoes in background

    Lean red meat can deliver nutrients like vitamin B-12, zinc and choline, according to experts. (iStock)

    “Our next phase of research will involve prospective and controlled interventional studies on how different dietary patterns and specific diet components influence nutrient adequacy and brain health,” Dhakal said. 

    Shalene McNeill, a registered dietitian nutritionist and executive director of nutrition research for the National Cattlemen’s Beef Association (NCBA), based in Colorado — which provided funding for the research — told Fox News Digital that many studies that link red and processed meat to chronic disease evaluate meat intake as part of unhealthy dietary patterns and lifestyles. 

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    “This study makes the important distinction of assessing red meat in the context of a healthy diet,” she said.

    The full study is currently under review for publication.

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  • Baby boomers are living longer than previous generations, but they have more health problems

    Baby boomers are living longer than previous generations, but they have more health problems

    Baby boomers are in worse health than previous generations at the same age point, a new study shows – and that may come at a higher cost for the United States. 

    Researchers looked at data from 114,500 people from the U.S. and 12 European countries and found that baby boomers were part of a “generational health drift.” The study included people born between 1896 and 1959, a span that includes the Greatest Generation, the Silent Generation and baby boomers, who were born after 1945. 


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    Baby boomers were more likely to have diabetes and high cholesterol than their predecessors, the study found. Cancer, lung disease and heart problems also were more prevalent, though rates were highest in the England and continental Europe. Obesity was more likely, too, except in southern Europe. And grip strength, which measures muscle strength and disability risk decreased in the U.S. and England.

    Yet, the life expectancy of baby boomers is much higher than previous generations. In 1945, life expectancy for men was 62.9 years; for women it was 68.4 years. Today, life expectancy is 74.8 years for men and 80.2 years for women.

    As baby boomers age, U.S. health care costs are expected to rise significantly, partly due to the sheer number of people who are hitting retirement age. By 2030, about 69.7 million people will be eligible for Medicare – nearly double the 35.1 million who were eligible in 2000. Medicare’s annual acute care cost is expected to hit $259.8 billion by the end of the decade. 

    Total spending for Medicare Part A, which pays inpatient care in hospitals and critical care facilities, is projected to exceed revenues by in 2030, forcing the program to dip into its trust fund. That fund would be depleted by 2036.

    Personal health care costs are rising, too. Fidelity Investments’ 2024 assessment found that 65-year-olds retiring this year will spend an average of $165,000 on health care expenses in retirement. That’s up 5% from 2023 and more than double the expected cost in 2002.

    Researcher Laura Gimeno, of University College London, stressed the important of preventative measures, like diet and exercise, to help younger generations avoid developing chronic health conditions at even higher rates than baby boomers. 

    “Generation X were more likely to be obese, have diabetes, and be in poor mental health than baby boomers in their 40s,” Gimeno, a lead author of the study, told CNN. “The fact that we aren’t seeing an improvement here is concerning.”

    Michaela Althouse

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  • Does North American Weed Have A Viking Background

    Does North American Weed Have A Viking Background

    It is been find in the Karma Sutra – but did Vikings play a role with weed in North America?

    While cannabis is having a moment globally as Canada, the US, Europe and more are looking to embrace the plant and invest in research to unlock more medical benefits, it has long be part of the global culture. The plants was first domesticated about 12,000 years ago in East Asia during the early Neolithic period. It has been part of documented ancient history in prehistoric societies in Eurasia and Africa. In appears in China, the Middle East, use spread throughout the Islamic empire to North Africa. In the mid 1500s, it spread to the western hemisphere.  And now, there may be a clue about it in North America.

    RELATED: Vinyls and Marijuana Go Together

    Archaeologists excavating and analyzing a Viking settlement in Newfoundland one substance raising some high-minded questions — cannabis. Published in the Proceedings of the National Academy of Sciences, researchers focused on L’Anse aux Meadows, a site in northern Newfoundland, Canada where Vikings landed and settled around the year 1000. Previously scientists believed Vikings only stayed in this spot a short time, but their work uncovered the possibility Vikings may have stayed until the 12th or 13th century. And they might have had marijuana with them.

    An archaeological team excavated a peat bog about 100 feet from the Viking settlement.  They found a layer of “ecofacts,” which are “environmental remains which may have been brought to the site by humans.” This layer was radiocarbon dated to the early Middle Ages and is where researchers discovered cannabis pollen, a plant not native to the area.

    The question propose how was the cannabis used? Were they producing clothing from the plant’s fibers or smoking it for medical or potentially recreational reasons? It also could mean none of these things, reminded the study’s lead author and postdoctoral fellow at Memorial University of Newfoundland, Paul Ledger.

    Earlier, marijuana was inhaled by Daoists, who burned it in incense burners. So it was used not only in religious ceremonies, but also for medical use including pain and other issues.  And in the Karma Sutra, it was used recreationally. Considering the hard life of a marauding Viking, a little pain relief and relaxation would be highly valued.

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    More research is being done to see if humans local to the Newfoundland area and not Vikings could have been the ones responsible for the cannabis pollen. Viking scholars are curious about the find and will continue to investigate.

    Anthony Washington

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  • Unbelievable facts

    Unbelievable facts

    A new research indicates that exercise can rewire the brain and help erase traumatic memories.

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  • Marijuana Users Enjoy Valentine’s More Wink Wink

    Marijuana Users Enjoy Valentine’s More Wink Wink

    Americans are expected to spend a record amount on Valentine’s Day this year despite a years-long decrease in the percentage of people celebrating the holiday, according to the annual survey released today by the National Retail Federation and Prosper Insights & Analytics.

    “The vast majority of Valentine’s Day dollars are still spent on significant others, but there’s a big increase this year in consumers spreading the love to children, parents, friends, and coworkers,” NRF President and CEO Matthew Shay said.

    “Those who are participating are spending more than ever and that could be the result of the strong economy. With employment and income growing, consumers appear to be expanding the scope of who qualifies for a card or a box of candy,” he added.

    RELATED: Doing This One Thing Can Greatly Improve Your Sex Life

    Another study from St. Louis University in Missouri found that cannabis could improve your love life. Researchers surveyed 133 women who consumed cannabis shortly before engaging in sexual activity. Of the women surveyed, 68% said that it made sex more pleasurable. From that same study, 62% of participants said that cannabis helps them achieve a more satisfying orgasm.

    A different study from Stanford found that women who abstained from cannabis in the past year had sex on average 6.0 times during the previous four weeks, whereas that number was 7.1 for daily cannabis users. Among men, the corresponding figure was 5.6 for nonusers and 6.9 for daily users. That means regular cannabis users are having 20% more sex than abstainers.

    This article originally appeared on Green Market Report. Read the full article here.

    Amy Hansen

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  • 30,000 Papers on Cannabis Published By Scientists in Last Decade | High Times

    30,000 Papers on Cannabis Published By Scientists in Last Decade | High Times

    The wave of legalization that has swept over the United States in the last decade has coincided with a swell in published research on cannabis.

    That is the finding unearthed by the marijuana advocacy group NORML this week. 

    Citing the results of a keyword search of the the National Library of Medicine/PubMed.gov website, NORML said that, for the third year in a row, “researchers worldwide published over 4,000 scientific papers specific to cannabis, its active constituents, and their effects.” 

    “Over the past decade, there has been a dramatic increase in scientific inquiries about the cannabis plant — with researchers publishing more than 32,000 scientific papers about cannabis since the beginning of 2013. Much of this uptick is a result of researchers’ newfound focus on marijuana’s therapeutic activities as well investigations into the real-world effects of legalization laws,” NORML said.

    According to NORML, “more than 70 percent of all peer-reviewed scientific papers about marijuana have been published in the past ten years, and over 90 percent of this literature has been published since 2002.”

    “As of this writing, PubMed.gov cites over 45,900 scientific papers on marijuana dating back to the year 1840. Available to the public online since 1996, PubMed is a free resource supporting the search and retrieval of biomedical and life sciences literature,” the organization added.

    NORML’s Deputy Director Paul Armentano said that the finding refutes critics who argue that there is insufficient research on cannabis.

    “Despite claims by some that marijuana has yet to be subject to adequate scientific scrutiny, scientists’ interest in studying cannabis has increased exponentially in recent years, as has our understanding of the plant, its active constituents, their mechanisms of action, and their effects on both the user and upon society,” Armentano said in a statement. “It is time for politicians and others to stop assessing cannabis through the lens of ‘what we don’t know’ and instead start engaging in evidence-based discussions about marijuana and marijuana reform policies that are indicative of all that we do know.”

    It seems that each week brings a fresh study on marijuana, and its effects on the mind and body. And not all of the findings provided support to marijuana advocates.

    One such study, published last month, found scant evidence that using cannabis can help addicts reduce or stop their long-term intake of illicit opioids.

    The study out of Australia involved more than 600 heroin addicts, and spanned 20 years.

    “Cannabis use is common among individuals with opioid use disorder, but it remains unclear whether cannabis use is associated with an increase or a reduction in illicit opioid use. To overcome limitations identified in previous longitudinal studies with limited follow-ups, the authors examined a within-person reciprocal relationship between cannabis and heroin use at several follow-ups over 18 to 20 years,” the researchers wrote in their introduction.

    “After accounting for a range of demographic variables, other substance use, and mental and physical health measures, an increase in cannabis use 24 months after baseline was significantly associated with an increase in heroin use at 36 months (estimate=0.21, SE=0.10). Additionally, an increase in heroin use at 3 months and 24 months was significantly associated with a decrease in cannabis use at 12 months (estimate=−0.27, SE=0.09) and 36 months (estimate=−0.22, SE=0.08). All other cross-lagged associations were not significant,” they said, in detailing their findings.

    While the study produced “some evidence of a significant relationship between cannabis and heroin use at earlier follow-ups,” the researchers noted that it was “sparse and inconsistent across time points.” 

    “Overall, there was insufficient evidence to suggest a unidirectional or bidirectional relationship between the use of these substances,” they said.

    Another study, also published in November, explored whether or not cannabis is a psychedelic substance. The answer, it turns out, isn’t so simple.

    “Cannabis and classic psychedelics are controlled substances with emerging evidence of efficacy in the treatment of a variety of psychiatric illnesses. Cannabis has largely not been regarded as having psychedelic effects in contemporary literature, despite many examples of historical use along with classic psychedelics to attain altered states of consciousness,” the researchers said

    “Research into the ‘psychedelic’ effects of cannabis, and delta-9-tetrahydrocannabinol (THC) in particular, could prove helpful for assessing potential therapeutic indications and elucidating the mechanism of action of both cannabis and classic psychedelics. This review aggregates and evaluates the literature assessing the capacity of cannabis to yield the perceptual changes, aversiveness, and mystical experiences more typically associated with classic psychedelics such as psilocybin. This review also provides a brief contrast of neuroimaging findings associated with the acute effects of cannabis and psychedelics. The available evidence suggests that high-THC cannabis may be able to elicit psychedelic effects, but that these effects may not have been observed in recent controlled research studies due to the doses, set, and settings commonly used.”

    They added, “Research is needed to investigate the effects of high doses of THC in the context utilized in therapeutic studies of psychedelics aimed to occasion psychedelic and/or therapeutic experiences. If cannabis can reliably generate psychedelic experiences under these conditions, high-THC dose cannabis treatments should be explored as potential adjunctive treatments for psychiatric disorders and be considered as an active comparator in clinical trials involving traditional psychedelic medications.”

    Thomas Edward

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  • The Cold-Medication Racket

    The Cold-Medication Racket

    You wake up with a stuffy nose, so you head to the pharmacy, where a plethora of options awaits in the cold-and-flu aisle. Ah, how lucky you are to live in 21st-century America. There’s Sudafed PE, which promises “maximum-strength sinus pressure and nasal congestion relief.” Sounds great. Or why not grab DayQuil in case other symptoms show up, or Tylenol Cold + Flu Severe should whatever it is get really bad? Could you have allergies instead? Good thing you can get Benadryl Allergy Plus Congestion, too.

    Unfortunately for you and me and everyone else in this country, the decongestant in all of these pills and syrups is entirely ineffective. The brand names might be different, but the active ingredient aimed at congestion is the same: phenylephrine. Roughly two decades ago, oral phenylephrine began proliferating on pharmacy shelves despite mounting—and now damning—evidence that the drug simply does not work.

    “It has been an open secret among pharmacists,” says Randy Hatton, a pharmacy professor at the University of Florida, who filed a citizen petition in 2007 and again in 2015 asking the FDA to reevaluate phenylephrine. This week, an advisory panel to the FDA voted 16–0 that the drug is ineffective orally, which could pave the way for the agency to finally pull the drug.

    If so, the impact would be huge. Phenylephrine is combined with fever reducers, cough suppressants, or antihistamines in many popular multidrug products such as the aforementioned DayQuil. Americans collectively shell out $1.763 billion a year for cold and allergy meds with phenylephrine, according to the FDA, which also calls the number a likely underestimate. That’s a lot of money for a decongestant that, again, does not work.

    Over-the-counter oral decongestants weren’t always this bad. But in the early 2000s, states began restricting access to pseudoephedrine—a different drug that actually is effective against congestion—because it could be used to make meth; the Combat Methamphetamine Epidemic Act, signed in 2006, took the restrictions national. You can still buy real-deal Sudafed containing pseudoephedrine, but you have to show an ID and sign a logbook. Meanwhile, manufacturers filled over-the-counter shelves with phenylephrine replacements such as Sudafed PE. The PE is for phenylephrine, but you would be forgiven for not noticing the different name.

    “Thet switch from pseudoephedrine to phenylephrine was a big mistake,” says Ronald Eccles, who ran the Common Cold Unit at Cardiff University until his retirement. Eccles was critical of the switch back in 2006. The evidence, he wrote at the time, was already pointing to phenylephrine as a lousy oral drug.

    Problems started showing up quickly. Hatton, who was then a co-director of the University of Florida Drug Information Center, started getting a flurry of questions about phenylephrine: Does it work? What’s the right dose? Because my patients are complaining that it’s not doing anything. He decided to investigate, and he went deep. Hatton filed a Freedom of Information Act request for the data behind FDA’s initial evaluation of the drug in 1976. He soon found himself searching through a banker’s box of records, looking for studies whose raw data he and a postdoctoral resident typed up by hand to reanalyze. The 14 studies the FDA had considered at the time had mixed results. Five of the positive ones were all conducted at the same research center, whose results looked better than everyone else’s. Hutton’s team thought that was suspicious. If you excluded those studies, the drug no longer looked effective at its usual dose.

    All told, the case for phenylephrine was not great, but the case against was no slam dunk either. When Hatton and colleagues at the University of Florida, including Leslie Hendeles, filed a citizen petition, they asked the agency to increase the maximum dose to something that could be more effective. They did not ask to pull the drug entirely.

    There was more damning evidence to come, though. The petition led to a first FDA advisory committee meeting, in 2007, where scientists from a pharmaceutical company named Schering-Plough, which later became Merck, presented brand-new data. The company had begun studying the drug, Hatton and Hendeles recalled, because it was interested in replacing the pseudoepinephrine in its allergy drug Claritin-D. But these industry scientists did not come to defend phenylephrine. Instead, they dismantled the very foundation of the drug’s supposed efficacy.

    They showed that almost no phenylephrine reaches the nasal passages, where it theoretically could reduce congestion and swelling by causing blood vessels to constrict. When taken orally, most of it gets destroyed in the gut; only 1 percent is active in the bloodstream. This seemed to be borne out by what people experienced when they took the drug—which was nothing. The scientists presented two more studies that found phenylephrine to be no better than placebo in people congested because of pollen allergies.

    These studies, the FDA later wrote, were “remarkable,” changing the way the agency thought about how oral phenylephrine works in the body. But experts still weren’t ready to write the drug off entirely. The 2007 meeting ended with the advisory committee asking for data from higher doses.

    The story for phenylephrine only got worse from there. In hopes of making an effective product, Merck went to study higher doses in two randomized clinical trials published in 2015 and 2016. “We went double, triple, quadruple—showed no benefit,” Eli Meltzer, an allergist who helped conduct the trials for Merck, said at the FDA-advisory-panel meeting this week. In other words, not only is phenylephrine ineffective at the labeled dosage of 10 milligrams every four hours, it is not even effective at four times that dose. These data prompted Hatton and Hendeles to file a second citizen petition and helped prompt this week’s advisory meeting. This time, the panel didn’t need any more data. “We’re kind of beating a dead horse … This is a done deal as far as I’m concerned. It doesn’t work,” one committee member, Paul Pisarik, said at the meeting. The advisory’s 16–0 vote is not binding, though, so it’s still up to the FDA to decide what to do about phenylephrine.

    In any case, phenylephrine is not the only cold-and-flu drug with questionable effectiveness in its approved form. The common cough drugs guaifenesin and dextromethorphan have both come under fire. But we lack the robust clinical-trial data to draw a definitive conclusion on those one way or the other. “What really helped our case is the fact that Merck funded those studies,” Hatton says. And that Merck let its scientists publish them. Failed studies from drug companies usually don’t see the light of day because they present few incentives for publication. Changing the consensus on phenylephrine took an extraordinary set of circumstances.

    It also required two dogged guys who have now been at this work for nearly two decades. “We’re just a couple of older professors from the University of Florida trying to do what’s best for society,” Hatton told me. When I asked whether they would be tackling other cold medications, he demurred: “I don’t know if either one of us has another 20 years in us.” He would instead like to see public funding for trials like Merck’s to reevaluate other over-the-counter drugs.

    There are other effective decongestants on pharmacy shelves. Even though phenylephrine does not work in pill form, “phenylephrine is very effective if you spray it into the nose,” Hendeles says. Neo-Synephrine is one such phenylephrine spray. Other nasal sprays containing other decongestants, such as Afrin, are also effective. But the only other common oral decongestant is pseudoephedrine, which requires that extra step of asking the pharmacist.
    Restricting pseudoephedrine has not  curbed the meth epidemic, either. Meth-related overdoses are skyrocketing, after Mexican drug rings perfected a newer, cheap way to make methamphetamine without using pseudoephedrine at all. This actually effective drug still remains behind the counter, while ineffective ones fill the shelves.

    Sarah Zhang

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  • Where End-of-Life Care Falls Short

    Where End-of-Life Care Falls Short

    This article originally appeared in Undark Magazine.

    When Kevin E. Taylor became a pastor 22 years ago, he didn’t expect how often he’d have to help families make gut-wrenching decisions for a loved one who was very ill or about to die. The families in his predominantly Black church in New Jersey generally didn’t have any written instructions, or conversations to recall, to help them know if their relative wanted—or didn’t want—certain types of medical treatment.

    So Taylor started encouraging church members to ask their elders questions, such as whether they would want to be kept on life support if they became sick and were unable to make decisions for themselves.

    “Each time you have the conversation, you destigmatize it,” says Taylor, now the senior pastor at Unity Fellowship Church NewArk, a Christian church with about 120 regular members.

    Taylor is part of an initiative led by Compassion & Choices, a nonprofit advocacy group that encourages more Black Americans to consider and document their medical wishes for the end of their life.

    End-of-life planning—also known as advance care planning, or ACP—usually requires a person to fill out legal documents that indicate the care they would want if they were to become unable to speak for themselves because of injury or illness. There are options to specify whether they would want life-sustaining care, even if it were unlikely to cure or improve their condition, or comfort care to manage pain, even if it hastened death. Medical groups have supported ACP, and proposed public-awareness campaigns aim to promote the practice.

    Yet research has found that many Americans—particularly Black Americans—have not bought into the promise of ACP. Advocates say that such plans are especially important for Black Americans, who are more likely to experience racial discrimination and lower-quality care throughout the health-care system. Advance care planning, they say, could help patients understand their options and document their wishes, as well as reduce anxiety for family members.

    However, the practice has also come under scrutiny in recent years: Some research suggests that it might not actually help patients get the kind of care they want at the end of life. It’s unclear whether those results are due to research methods or to a failure of ACP itself; comparing the care that individuals said they want in the future with the care they actually received while dying is exceedingly difficult. And many studies that show the shortcomings of ACP look predominantly at white patients.

    Still, researchers maintain that encouraging discussions about end-of-life care is important, while also acknowledging that ACP needs either improvement or an overhaul. “We should be looking for, okay, what else can we do other than advance care planning?” says Karen Bullock, a social-work professor at Boston College, who researches decision-making and acceptance around ACP in Black communities. “Or can we do something different with advance care planning?”

    Advance care planning was first proposed in the U.S. in 1967, when a lawyer for the now-defunct Euthanasia Society of America advocated for the idea of a living will—a document that would allow a person to indicate whether to withhold or withdraw life-sustaining treatment if they were no longer capable of making health-care decisions. By 1986, most states had adopted living-will laws that established standardized documents for patients, as well as protections for physicians who complied with patients’ wishes.

    Over the past four decades, ACP has expanded to include a range of legal documents, called advance directives, for detailing one’s wishes for end-of-life care. In addition to do-not-resuscitate, or DNR, orders, patients can list treatments they would want and under which scenarios, as well as appoint a surrogate to make health-care decisions for them. Health-care facilities that receive Medicare or Medicaid reimbursement are required to ask whether patients have advance directives, and to provide them with relevant information. And in most states, doctors can record a patient’s end-of-life wishes in a form called a Provider Order for Life-Sustaining Treatment. These documents encourage patients to talk with their physician about their wishes, which are then added to the patient chart, unlike advance directives, which usually consist of the patient filling out forms themselves without discussing them directly with their doctor.

    But as far as who makes those plans, research has shown a racial disparity: A 2016 study of more than 2,000 adults, all of whom were over the age of 50, showed that 44 percent of white participants had completed an advance directive, compared with 24 percent of Black participants. Many people simply aren’t aware of ACP or don’t fully understand it. And for Black individuals, that knowledge may be especially hard to come by—one study found that clinicians tend to avoid discussions with Black and other nonwhite patients about the care they want at the end of life, because they feel uncomfortable broaching these conversations or are unsure of whether patients want to have them.

    Other research has found that Black Americans may be more hesitant to fill out documents in part because of a mistrust in the health-care system, rooted in a long history of racist treatment. “It’s a direct, in my opinion, outcome from segregated health-care systems,” Bullock says. “When we forced integration, integration didn’t mean equitable care.”

    Religion can also be a major barrier to ACP. A large proportion of Black Americans are religious, and some say they are hesitant to engage in ACP because of the belief that God, rather than clinicians, should decide their fate. That’s one reason programs such as Compassion & Choices have looked to churches to make ACP more accessible. Several studies support the effectiveness of sharing health messages, including about smoking cessation and heart health, in church communities. “Black people tend to trust their faith leaders, and so if the church is saying this is a good thing to do, then we will be willing to try it,” Bullock says.

    But in 2021, an article by palliative-care doctors laid bare the growing evidence that ACP may be failing to get patients the end-of-life care they want, also known as goal-concordant care. The paper summarized the findings of numerous studies investigating the effectiveness of the practice, and concluded that “despite the intrinsic logic of ACP, the evidence suggests it does not have the desired effect.”

    For example, although some studies identified benefits such as increased likelihood of a patient dying in the place they desired or avoiding unwanted resuscitation, others found the opposite. One study found that seriously ill patients who prioritized comfort care in their advance directive spent practically just as many days in the hospital as did patients who prioritized life-extending experiences. The authors of the 2021 summary paper suggested several reasons that goal-concordant care might not occur: Patients may request treatments that are not available; clinicians may not have access to the documentation; surrogates may override patients’ requests.

    A pair of older studies suggested that these issues might be especially pronounced for Black patients; they found that Black patients with cancer who had signed DNR orders were more likely to be resuscitated, for example. These studies have been held up as evidence that Black Americans receive less goal-concordant care. But Holly Prigerson, a researcher at Cornell University who oversaw the studies, notes that her team investigated the care of Black participants who were resuscitated against their wishes, and in those cases, clinicians did not have access to their records because the patients had been transferred from another hospital.

    One issue facing research on advance care planning is that so many studies focus on white patients, giving little insight into whether ACP helps Black patients. For example, in two recent studies on the subject, more than 90 percent of patients were white.

    Many experts, including Prigerson, agree that it’s important to devise new approaches to assess goal-concordant care, which generally relies on what patients indicated in advance directives or what they told family members months or years before dying. But patients change their mind, and relatives may not understand or accept their wishes.

    “It’s a very problematic thing to assess,” Prigerson says. “It’s not impossible, but there are so many issues with it.”

    As for whether ACP can manage to improve end-of-life care specifically in areas where Black patients receive worse care, such as pain management, experts such as Bullock note that studies have not really explored that question. But addressing other racial disparities—including correcting physicians’ false beliefs about Black patients being less sensitive to pain, improving how physicians communicate with Black patients, and strengthening social supports for patients who want to enroll in hospice—is likely more crucial than expanding ACP.

    ACP “may be part of the solution, but it is not going to be sufficient,” says Robert M. Arnold, a University of Pittsburgh professor of palliative care and medical ethics, and one of the authors of the 2021 article that questioned the benefits of ACP.

    Many of the shortcomings of ACP, including the low engagement rate and the unclear benefits, have prompted researchers and clinicians to think about how to overhaul the practice.

    Efforts to make ACP more accessible have spanned creating easy-to-read versions absent any legalese, and short, simple videos. A 2023 study found that one program that incorporated these elements, called PREPARE for Your Care, helped both white and Black adults with chronic medical conditions get goal-concordant care. The study stood out because it asked patients who were still able to communicate if they were getting the medical care they wanted, rather than waiting until after they died to evaluate goal-concordant care.

    “That, to me, is incredibly important,” says Rebecca Sudore, a geriatrician and researcher at UC San Francisco, who was the senior author of the study and helped develop PREPARE for Your Care. Sudore and her colleagues have proposed “real-time assessment from patients and their caregivers” to more accurately measure goal-concordant care.

    In the past few years, clinicians have become more aware that ACP should involve ongoing conversations and shared decision-making among patients, clinicians, and surrogates, rather than just legal documents, says Ramona Rhodes, a geriatrician affiliated with the University of Arkansas for Medical Sciences.

    Rhodes and her colleagues are leading a study to address whether certain types of ACP can promote engagement and improve care for Black patients. A group of older patients—half are Black, and half are white—with serious illnesses at clinics across the South are receiving materials either for Respecting Choices, an ACP guide that focuses on conversations with patients and families, or Five Wishes, a short patient questionnaire and the most widely used advance directive in the United States. The team hypothesizes that Respecting Choices will lead to greater participation among Black patients and possibly more goal-concordant care, if it prepares patients and families to talk with clinicians about their wishes, Rhodes says.

    Taylor, the pastor, notes that when he talks with church members about planning for end-of-life care, they often see the importance of it for the first time. And it usually persuades them to take action. “Sometimes it’s awkward,” he says. “But it’s now awkward and informed.”

    Carina Storrs

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  • Ticks’ Secret Weapon

    Ticks’ Secret Weapon

    In the three-plus decades I’ve been alive, I have never been bitten by a tick. Actually, that may be a lie, and I have no way of knowing for sure. Because even though ticks have harpoonlike mouthparts, even though certain species can latch on for up to two weeks, even though some guzzle enough blood to swell 100 times in weight, their bites are disturbingly discreet. “As a kid, I would have hundreds of ticks on me,” at least several of which would bite, says Adela Oliva Chavez, a tick researcher at Texas A&M University. And yet she would never notice until her aunt would pick them off her skin.

    The secret behind tick stealth is tick saliva—a strange, slippery, and multifaceted fluid with no biological peer. It keeps the pests’ bites bizarrely itch- and pain-free, and allows them to feed unimpeded by their hosts’ immunity. As climate change remodels the world, spit is also what’s helping ticks enter new habitats and hosts—bringing with them the many deadly viruses, bacteria, and parasites they so often import.

    For all their dependency on blood, ticks almost never eat. In their sometimes-multiyear life span, they may feed only once in each stage: larva, nymph, and adult. Which means, as my colleague Sarah Zhang once wrote, each meal must count for an awful lot. Unlike mosquitoes and other bloodsucking bugs that can get away with a dine and dash, ticks must linger on flesh for days or even weeks—an extended feast that requires them to essentially graft onto the host’s body like a temporary limb.

    For the entirety of that process, saliva is key. When a tick first bites, its spit lines the wound with a gluelike substance that cements its mouth in place. Once secure, the tick deploys a fleet of spit-borne compounds that dilate its host’s vessels, while simultaneously battling the bodily compounds that would normally prompt the injury to clot, heal, or tingle with pain or itch. Under most circumstances, such an onslaught of foreign molecules would instantly marshal the body’s immune cavalry. But ticks have workarounds for that too. Their saliva is an anti-inflammatory and an analgesic; it can disable the alarms that cells send to one another, preventing them from coordinating an attack. Spit can even reprogram immune cells so that they never complete their development or receive the cues they need to gather at the scene.

    All of these strategies can also ease the way for bacteria, viruses, and parasites that the tick swallows from one host, then deposits into the next. With tick saliva breaching the skin barrier and keeping the immune system in check, all the pathogens have to do is come along for the ride. “Tick saliva is like a luxury vehicle that delivers them to the site of infection and rolls out the red carpet,” says Seemay Chou, the CEO of the biotech start-up Arcadia Science. Studies have shown that multiple pathogens get an infectious boost when chauffeured by spit, spilling more efficiently into the skin of newly bitten hosts. Borrelia burgdorferi, the bacterium that causes Lyme disease, will even slather parts of tick saliva onto itself like a cloak, essentially rendering itself invisible to bodily defense. Ticks’ infectious cargo may even egg each other on: Saravanan Thangamani, at Upstate Medical University, in New York, has found evidence that ticks simultaneously carrying Borrelia and Powassan virus may end up injecting more of the latter into fresh wounds.

    Already, ticks spread more pathogens to humans and their livestock than any other insect or arachnid. And the risks ticks pose may only be growing, as warming temperatures and human meddling with wildlife allow them to expand their geographic range and infiltrate new hosts. In North America, lone-star ticks and black-legged ticks have been orchestrating a concerted march north into Canada. At the same time, the percentage of ticks carrying infections is also increasing, Thangamani told me, and for decades now, case counts of Lyme disease and tick-borne encephalitis in several parts of the world have been on a steady rise. As cold seasons shrink, the periods of the year when ticks bite—usually, the warmest months—are expanding too. “Many, many places are getting filled up with ticks,” says Jean Tsao, an entomologist at Michigan State University. “And they’re going to get more.”

    It helps that many ticks aren’t picky about whom they carry or bite. Some species, as they push into new places, have picked up new pathogens in the past few years—Bourbon virus, heartland virus—that pose additional threats to us. Many tick species are also relatively indiscriminate about their hosts: Within its lifetime, a single deer tick may “feed very happily on reptiles, avians, and birds,” says Pat Nuttall, a virologist and tick researcher at the University of Oxford. Their spit is intricate enough that it can be tailored to counteract the defenses of each species in turn. Transfer a tick from a rabbit to a human or a dog, Oliva Chavez told me, and it will take notice—and adjust its saliva, quite literally to taste.

    Vaccines to combat Lyme and other tick-borne diseases have long been in development. But many researchers think the more efficient tactic is going after the tick itself—a strategy that could, at best, “stop the transmission of several pathogens at once,” says Girish Neelakanta, a tick biologist at the University of Tennessee at Knoxville. Anti-tick immunity is possible: Studies have documented guinea pigs, cattle, rabbits, goats, and dogs developing sustained defenses against the arachnids after they’ve been bitten over and over again—even reactions that can help the animals detect a bite immediately, and sweep the pest away.

    But spit is a slippery target for bodily defenses to hit. The substance doesn’t just shut down immune responses. It also reformulates itself constantly so that it can keep evading the host’s defenses—as often as every few hours, faster than most of the immune system can keep track. By the time the body has prepped an assault on one salivary ingredient, the tick has almost certainly swapped it out for the next. “It’s a game that the tick is playing, a catch-me-if-you-can kind of thing,” says Sukanya Narasimhan, a tick researcher at Yale. To outcompete the tick’s tricks, Narasimhan thinks it will be key to develop a vaccine that triggers the body to respond to tick bites fast, “as soon as a tick attaches,” she said, ideally by targeting the saliva’s first ingredients.

    As ticks continue their takeover, it’s hard not to develop at least some grudging respect for their pluck. Some scientists even think that studying, or perhaps mimicking, their saliva could lead to other breakthroughs. Copycatting the spit’s immunosuppressive tendencies could be useful for the treatment of asthma, or for drugs that assist in organ transplants; imitating its anticoagulant properties could help keep life-threatening clots at bay. Some tick-saliva ingredients have even prompted investigations into their potential as cancer therapy. Ticks, after all, have been studying mammalian bodies for millions of years, all in hopes of subterfuge; under their tutelage, Chou, the Arcadia Science CEO, hopes to learn more about the molecular pathways that drive the urge to itch.

    Ticks aren’t invincible, though, and some of the same global changes now easing their entry into new habitats could eventually hinder their progress. Already, they are fleeing parts of the planet that have grown too hot, too humid, too flooded, too razed with wildfires for them or their preferred hosts to survive, including certain inhospitable pockets of the American South. A tick decline could be good for us. But it would also be a symptom of a planetary scourge that has grown worse. Ticks, undoubtedly, “will continue to adapt,” Thangamani told me. And yet they, too, have their limits—further, but not that much further, beyond our own.

    Katherine J. Wu

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  • Pay a Little Less Attention to Your Friends

    Pay a Little Less Attention to Your Friends

    About two years ago, one of my psychiatry patients was giving me particular trouble. He had depression, and despite his usual chattiness, I just couldn’t find a way to engage him on our Zoom calls. He seemed to be avoiding eye contact and stayed quiet, giving only short answers to my questions. I worried he would drop out of treatment, so I suggested that we do something I rarely do with patients: go for a walk.

    We met at a park on a brisk fall day and sat on a bench when we were done. Among the few people nearby was a group of workers, who were cleaning the grounds, chatting loudly, and obviously having fun. As I tried to ask my patient about his studies, he kept breaking eye contact with me to look at the workers. Just as we were finishing, he became tearful and said that he felt very lonely. It was the most he’d opened up to me in many months, and I was relieved. Perhaps the sight of these convivial young men was a reminder of his painful isolation that he simply couldn’t ignore. Or perhaps the act of walking together had finally made him comfortable enough to open up. Either way, it never would have happened on Zoom or in my office.

    My experience with my patient runs contrary to the American fixation on attention. At work, we are lauded for displaying unbroken focus on the task at hand, while some companies punish employees for taking too many breaks away from their computer. With friends, we are expected to be active and engaged listeners, something that demands nearly constant awareness. Being hyper-focused on what people are saying and trying hard not to break your attention might seem like a way to fast-forward a friendship and make meaningful connections. But in fact, that level of intensity can make you feel less connected to other people. If you really want to nurture a relationship, shared distraction might be more powerful.

    If you’ve ever defused an awkward social situation with unrelated small talk or an icebreaker game, you’re already familiar with the social benefits of distraction. Indeed, a handful of studies, while not investigating distraction per se, have suggested that engaging in a shared distracting activity, such as physical exercise, can enhance feelings of social connectedness and pleasure. This is in stark contrast to the alienating, alone-together experience of people who each engage in their own distracting activity, such as staring at their smartphone.

    Although the mechanism by which distraction might increase a feeling of social connectedness is unclear, there are some plausible explanations. Engaging in physical activity, even one as gentle as walking, has been associated with a substantial increase in creative, divergent, and associative thinking—perhaps because moving takes our focus away from ourselves. Creative thinking, in turn, has the potential to move the conversation along in unpredictable ways, perhaps activating the neural reward pathways that rejoice in novelty and thereby making us delight more in one another’s presence. And moving isn’t strictly necessary for the creative benefits of distraction to occur: A 2022 study published in Nature found that just taking note of one’s environment can enhance creative thinking.

    That study also found that pairs working together virtually were less likely to notice their surroundings; instead, they spent more time looking directly at each other’s images. This is decidedly not good for conversation. Staring at a social partner’s face is cognitively and emotionally exhausting, and can be a sign of a domineering nature. Just as you’ve probably experienced the social benefits of distraction, you’ve also probably noticed the social drawbacks of too much intensity. Years ago, hundreds of thousands of people, myself included, went to the Museum of Modern Art to see the Serbian conceptual artist Marina Abramović’s classic performance piece, in which she sat at a small wooden table, staring silently and impassively for several minutes at the face of any visitor who sat across from her. The encounters were uncomfortable at best, and grueling at worst. By removing nearly all ambient stimulation and props, Abramović had underscored their crucial importance.

    The discomfort of extended eye contact helps explain why having natural-seeming, friendship-enforcing interactions over platforms like Zoom and FaceTime can be so difficult: They largely remove the rich world of distractions and force us to stare at the face of our social partner. But for most of us, some degree of virtual connection is unavoidable. For example, a recent Pew Research Center survey estimated that more than 30 percent of employed American adults continue to work largely by Zoom, and even more on a hybrid schedule. But we can still leverage the social advantages of distraction even when we can’t physically be with friends and loved ones.

    One idea is simply to turn off your camera, and thereby remove the option of staring intently into each other’s pixelated eyes. During the height of the pandemic, I taught my residents by Zoom and became very frustrated when they switched off their video. I thought they were zoning out, but perhaps they were stretching or pacing about their apartment, getting a small dose of distraction and making their Zoom experience richer. The reason it felt annoying to me was because it was one-sided; maybe we would have had a better, more creative dialogue if we had all gone off camera together. At the other extreme, try leaving your video on and picking a conversation-starting background, or taking your conversation partner on a virtual tour of your surroundings, or playing a game together. If your friend spaces out, don’t take offense as I did. Ask them what they just saw or imagined and let the conversation flow.

    When you have the luxury of face-to-face contact, skip the staring contest and get out in the world together. You’ll be surprised at the places that can nurture conversation: a lively bar, a challenging fitness class, the sidelines of a riotous parade. Shouting over the noise can be a bonding experience. But be sure you don’t pick something that’s too distracting—otherwise you’ll each be in your own bubble of experience. That happened to me a few years ago, zip-lining with my husband in the Catskill Mountains. It was fun, but ultimately an exercise of being alone together. We debriefed later.

    There’s a time and place for intense, focused conversation, if not intense, focused eye contact. If your friend comes to you in a crisis, or your partner is in the middle of confessing their love, they probably won’t appreciate you pointing out the guy with his pet scarlet macaw passing by (yes, I’ve had the pleasure of seeing this a few times in New York City). But mostly, we stand to benefit when we allow a little bit of the world to intrude.

    Richard A. Friedman

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  • MSG Is Finally Getting Its Revenge

    MSG Is Finally Getting Its Revenge

    Updated at 1:45 p.m. ET on May 17, 2023

    In March, the World Health Organization issued a dire warning that was also completely obvious: Nearly everyone on the planet consumes too much salt. And not just a sprinkle too much; on average, people consume more than double what is advisable every single day, raising the risk of common diseases such as heart attack and stroke. If governments intervene in such profligate salt intake, the WHO urged, they could save the lives of 7 million people by 2030.

    Such warnings about salt are so ubiquitous that they are easy to tune out. In the United States, salt intake has been a public-health issue for more than half a century; since then, the initiatives launched to combat it have been deemed by health officials as “too numerous to describe,” but little has changed in terms of policy or appetite. The main reason salt has remained a problem is that it’s a major part of all processed food—and, well, it makes everything delicious. Persuading Americans to reduce their consumption would require a convincing dupe—something that would cut down on unhealthy sodium without making food any less tasty.

    No perfect dupe exists. But the next best thing could be … MSG. Seriously. Last month, the FDA proposed reducing sodium in certain foods using salt substitutes. One candidate that has research behind it is monosodium glutamate, the white crystalline powder that has long been maligned in the West as an unhealthy food additive. A common seasoning in some Asian cuisines, MSG was linked in the late 1960s to ailments—headaches, numbness, dizziness, heart palpitations—that became known as Chinese Restaurant Syndrome. The health concerns around MSG have since been debunked, and the FDA considers it safe to eat. But it still has a bad rap: Many products are still proudly advertised as MSG free. Now the chemical may soon get its revenge. Given the chance to replace salt in some of our food, it could eventually come to represent something wholesome—perhaps even something close to healthy.

    The concerns with MSG originated in 1968, when a Chinese American physician, writing in The New England Journal of Medicine, described feeling generally ill after eating Chinese food, which he suggested could be because of MSG. Other researchers quickly produced studies that seemed to substantiate this claim, and MSG became a public-health villain. In the ’70s, the Chicago Tribune ran the headline “Chinese Food Make You Crazy? MSG Is No. 1 Suspect.” All the attention “renewed medical legitimacy [for] a number of long-held assumptions about the strangely ‘exotic’, ‘bizarre’ and ‘excessive’ practices associated with Chinese culture,” the historian Ian Mosby wrote in 2009. That’s not to say that all symptoms associated with MSG are bunk; people can be sensitive to MSG—like any food—and may experience broad symptoms such as headaches after eating it, Amanda Li, a dietary nutritionist at the University of Washington, told me. But “research has shown no clear evidence linking MSG consumption to any serious potential adverse reactions,” she said.

    On the whole, MSG does seem better than salt itself, considering that excessive salt consumption poses so many chronic health risks. A relatively small amount of MSG could be used to rescue flavor in reduced-salt products without endangering health. This is possible partly because of MSG’s molecular makeup. It satisfies the need for salt to a certain extent because it contains sodium (it’s right there in the name, after all)—but just a third of the amount, by weight, that salt does. The rest of the molecule is made of the amino acid L-glutamate, which registers as the savory, “brothy” flavor known as umami.

    MSG isn’t a one-to-one replacement for salt, but that’s what makes it such a promising alternative. It is a general flavor enhancer, meaning that it can amplify the perception of salt and other flavors that are already in a dish, as well as add an umami element, Soo-Yeun Lee, a sensory scientist and the director of Washington State University’s School of Food Science, told me. One secret to this effect is that unlike salt, which imparts a blast of flavor and then quickly dissipates, MSG stays on the tongue long after food is swallowed, producing a lasting savory sensation, Lee said.  It may amplify saltiness by increasing salivation, letting sodium molecules wash over the tongue more freely, Aubrey Dunteman, a food scientist at the University of Illinois at Urbana-Champaign, told me.

    All of this gives MSG the potential to play into a salt-reduction strategy. A 2019 study in the journal Nutrients found that substituting MSG (or other similar but more obscure chemicals) for some of the salt in certain foods could have major impacts: Adults who eat cured meats could cut 40 percent of their intake; cheese eaters, 45 percent. Another study from researchers in Japan found that incorporating MSG and other umami substances into common Japanese condiments, such as soy sauce, seasoning salt, and miso paste, could cut salt intake by up to 22.3 percent. Doing the same in curry-chicken and chili-chicken soups, Malaysian scientists found, could be used to reduce the recipes’ salt content by 32.5 percent.

    Take those findings with a grain of, uh, MSG. Recent studies have uniformly found that MSG is a safe, promising salt replacement, but many, including both the Nutrients study and the Japanese one, were funded at least in part by Ajinomoto Co.—the company that introduced the first commercial form of the substance—or the International Glutamate Technical Committee, a trade group. Lee and Dunteman have also received funding from Ajinomoto for some of their MSG work, including a study showing that the substance could improve the flavor of reduced-sodium bread. Lee said she aimed to show that MSG substitution for salt is “feasible, so if any food companies want to take that up and try it on their own systems,” they have a basis for doing so. Her goal, she added, “is not to sell bread with MSG.” (The paper, along with the two others mentioned that received industry funding, were independently peer-reviewed.)

    Clearly, more independent research is needed, but food companies have plenty of incentive to help find a better alternative to salt. More than 70 percent of Americans’ salt consumption comes from processed and manufactured food, and if the FDA decides to crack down on salt intake, its policies will largely target the food industry, Lee said. Already, some manufacturers of canned soup and fish are experimenting with salt substitutes.

    Deploying MSG in a sweeping sodium-reduction campaign would not be straightforward. MSG is more expensive than salt, Dunteman noted. More crucially, in many foods, salt provides more than flavor; it can also act as a preservative and regulate texture by, say, adding juiciness to lean meat or stabilizing leavened dough. In their study on bread, Lee and Dunteman found that removing too much salt reduced chewiness and firmness, even when MSG made up for taste. Among common processed foods, bread is a prime target for future MSG research, because it is the biggest contributor to U.S. sodium intake—not only because of its salt content but also because of the sheer amount of it that Americans consume. When MSG is used instead of salt to enhance flavor, “foods can taste just as delicious but without affecting hypertension,” Katherine Burt, a professor of health promotion and nutrition sciences at Lehman College, whose writing on MSG was not industry funded, told me. It’s “a great way to make foods exciting and healthy.”

    MSG can also be used to deliberately reduce salt intake at home. Adding a new ingredient to a home pantry can be daunting, but consider that MSG is already in most kitchens, occurring naturally in umami-rich items such as Parmesan cheese and mushrooms and added to processed foods such as Campbell’s Soup and Doritos. These days, it’s easy enough to find it online or in stores, sold in shakers or packets, much like salt. Li recommends that the MSG-curious start seasoning their food with a 50–50 mixture of MSG and table salt. When eating processed foods, choose low-sodium versions of products (not “reduced sodium” goods, which may not actually have low levels of salt). They’ll likely taste terrible, so add MSG in increments until they taste good, Lee said.

    We still have much to learn about MSG as a salt substitute, but the biggest challenge to it taking off is cultural, not scientific. To a certain degree, tastes are changing: Celebrity chefs such as David Chang champion it, and one highly acclaimed New York restaurant now serves an MSG martini. But the perception that MSG is unhealthy still persists, despite evidence to the contrary. Words such as “sneaky,” “disguised,” and “nasty” are still used to describe it, and grocery stores such as Whole Foods and Trader Joe’s make a point of mentioning that their foods have no MSG. Nevertheless, as long as old misconceptions about MSG persist, they will continue to hamper the potential for a better salt substitute. America’s aversion toward MSG may be intended to promote better health, but at this point, it might just be doing precisely the opposite.


    This story originally stated that the New England Journal of Medicine letter about MSG was a hoax. This was once believed but has since been disproved.

    Yasmin Tayag

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